Basking shelves, advice?

[Bogertophis]

That's what I meant with the expanding foam, using it to fill in all the gaps so it's one solid piece. And this whole thing will be for my VBB, of which I've heard they like elevated platforms like this.

That's what I thought you meant, but wanted to be sure you included the edge, & also to make sure others reading didn't misunderstand & decide to "copy" your idea. Will the foam be sturdy enough though? I mean, will it stay attached to those narrow metal "wires"?

I agree that your VBB will like things like this. Branches too- you don't really need a solid platform for a rat snake, you know. If you criss-cross some branches, they'll hang out like it's their favorite sofa...+ you can attach something much easier like a large basket or 2. They're also easier to remove to clean or replace as needed- PLUS the air & heat flow thru them. I think you might be working too hard. (And you can place some moist moss in a basket too- it won't stay on a ledge but it will stay in a basket.)